Door lock system

Abstract

An input shaft of a key lever that transmits a rotating drive force from a key cylinder in response to a key operation is arranged in a lower side of a door housing so that the rain water and the like does not easily reach the input shaft.

1. A door lock system comprising:
 a latch mechanism housing, 
 a latch mechanism that is housed within said latch mechanism housing and maintains a closed state of a door to a main body of a vehicle and enables the door to be opened with respect to the main body in response to an operation on a handle, 
 a lock mechanism housing, said lock mechanism housing being of a size and shape that provides integral assembly with the latch mechanism housing, 
 a lock mechanism that is housed within said lock mechanism housing and that switches to an unlocked state when a door opening operation is performed on the handle and switches to a locked state when a door closing operation is performed on the handle, 
 a positioning unit comprising:
 a shaft provided in and extended from one of the two housings, and 
 a concave portion into which the shaft is inserted and fitted along the extending direction of the shaft, provided in other one of the two housings, and when said two housings are integrally assembled, fits the positions of the latch mechanism and the lock mechanism by inserting and fitting the shaft into the concave portion; and 
 
 a restricting unit that restricts relative movements of the latch mechanism housing and the lock mechanism housing when integrally assembled, in directions other than the extending direction of the shaft when the shaft is inserted and fitted into the concave portion, 
 wherein said restricting unit comprises: 
 a latch mechanism attaching portion disposed on a door rear side of the lock mechanism housing and extending from an indoor side to an outdoor side of the door lock system; and 
 a casing formed in said latch mechanism attaching portion, defined by wall portions extending from said lock mechanism housing in said shaft extending direction, wherein said shaft extending direction is along a direction extending between a door front side and the door rear side of the door lock system, 
 wherein said wall portions include a circumferential wall continuously formed around an upper side, the outdoor side, and a portion of the lower side of the casing, so that an opening is formed at the indoor side of the casing, and 
 wherein said wall portions further include a seizing piece disposed at an opening edge of the opening, extending from the opening edge in said shaft extending direction so as to be sandwiched between a base plate and a cover plate of said latch mechanism housing, and 
 wherein an attaching hole is formed in each of the seizing piece, the base plate and the cover plate, and the attaching holes are axially aligned whereby an attaching screw is inserted in the aligned attaching holes so as to attach the latch mechanism housing to the lock mechanism housing. 
 
     
     
       2. The door lock system of  claim 1 , wherein said shaft is operatively coupled to a door handle, said door handle being supported by said shaft so as to be swingable around said shaft. 
     
     
       3. A door lock system to be attached to a door of a vehicle, comprising:
 a latch mechanism housing, 
 a latch mechanism that is housed within said latch mechanism housing and maintains a closed state of the door to a main body of the vehicle and enables the door to be opened with respect to the main body in response to an operation on a handle, 
 a lock mechanism housing, said lock mechanism housing being of a size and shape that provides integral assembly with the latch mechanism housing, 
 a lock mechanism that is housed within said lock mechanism housing and that switches to an unlocked state when a door opening operation is performed on the handle and switches to a locked state when a door closing operation is performed on the handle, 
 a courtesy switch that is provided inside of the latch mechanism housing and comes into abrasive contact with a cam surface formed on a latch to detect the latch position, and 
 a signal cable that is connected to the courtesy switch and is extended from inside of the latch mechanism housing and nipped and held between the latch mechanism housing and the lock mechanism housing when said housings are integrally assembled, 
 a latch mechanism attaching portion disposed on a door rear side of the lock mechanism housing and extending to the interior side of the door for restricting relative movement of the lock mechanism housing and the latch mechanism housing when said housings are integrally assembled; and 
 a casing formed in said latch mechanism attaching portion, defined by wall portions extending from one of said latch mechanism housing and said lock mechanism housing along a direction extending between a door front side and a door rear side of the door lock system, 
 wherein said wall portions include a circumferential wall continuously formed around an upper side, an outdoor side, and a portion of a lower side of the casing, so that an opening is formed at the indoor side of the casing, 
 wherein the latch mechanism housing has a side surface formed slightly smaller than the circumferential wall so as to form a clearance between the circumferential wall and the side surface to accommodate the signal cable therein when said housings are integrally assembled, and 
 wherein claws, formed on said circumferential wall and extending toward the indoor side of the casing, hold the signal cable with in the clearance so as to prevent the signal cable from bulging out between the latch, mechanism housing and the circumferential wall when said housings are integrally assembled.